In 1973, one of the most-watched sporting events in history took place — and it had nothing to do with the MLB, NBA, or NFL. It was a tennis match. Former top-ranked tennis player Bobby Riggs took on then-current World No. 1 female player Billie Jean King in what became known as "The Battle of the Sexes". When the match was over, it would kick off a global conversation on gender equality and reinvigorate the feminist movement. Starring Emma Sone and Steve Carell, Battle of the Sexes comes to theaters September 22, 2017.